# Damping Ratio

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Damping ratio, abbreviated as $$\zeta$$, a dimensionless number, describes how oscillations in a system decay after a disturbance.

## Damping Ratio formula

 $$\large{ \zeta = \frac{ 1 }{ 2 \; Q } }$$

### Where:

 Units English Metric $$\large{ \zeta }$$  (Greek symbol zeta) = damping ratio $$\large{ dimensionless }$$ $$\large{ Q }$$ = quality factor $$\large{ dimensionless }$$